knotty
英 ['nɒtɪ]
美['nɑti]
	    - adj. 棘手的,难解决的;[木] 多节的;有结的
 
英英释意
- 1. making great mental demands; hard to comprehend or solve;
 - "a baffling problem"
 - "I faced the knotty problem of what to have for breakfast"
 - "a problematic situation at home"
 
- 2. used of old persons or old trees; covered with knobs or knots;
 - "gnarled and knotted hands"
 - "a knobbed stick"
 
- 3. highly involved or intricate;
 - "the Byzantine tax structure"
 - "convoluted legal language"
 - "convoluted reasoning"
 - "intricate needlework"
 - "an intricate labyrinth of refined phraseology"
 - "the plot was too involved"
 - "a knotty problem"
 - "got his way by labyrinthine maneuvering"
 - "Oh, what a tangled web we weave"- Sir Walter Scott
 - "tortuous legal procedures"
 - "tortuous negotiations lasting for months"